Ball-grinding machine.



B. EITNER. BALL GRINDING MACHINE. APPLIOATIQN FILED AUG. a1, 1909.-

irai) strains ATENT FFICE.

BERTHOLD EITNER, 0F BERLIN,1GEIRMANY;

BALL-Gambino MACHINE.

Specification of Letters Patent.

Lo all whom it may concern: l lle it known that LBEn'rHoLD Ermua,

work-master, a subject'of the King of Pros-f' sia, residingat No. 14Gotzkowskystrasse,

Berlin, in the Kingdom of Prussia, Geriv Iii-any, have invented certainnew and useful Improvements in and Relating to Ballhorizontal plane andin combination with the grooved metal plate which is fixed beneath therotating emery platea device for removing and mixing the balls isconnected with its edge.- This device is fitted to the metal plate insuch a manner thatwfor the purpose of removing: and returning the ballsto be mixed an extension of the grooved paths is provided in thehorizontal plate with annular `grooves, this extension pro cee'diug incurves outward vto a mixing chamber and then being again curved inwardso that the/balls issuing from one grooved patlr are always able toenter another gi'ooved path.

-In the accompanying drawing, Figures 1, 2 and 3, illustrate the novelarrangement of the grinding plates and the means for de- He'cting andmixing the balls on a ball i `grinding machine of known construction.

Obviously the cinploymentyof the novel arrangement of the grindingplates to which the' invention mainly relates is in no way confined tothe construction illustrated and its details such as the method ofdriving, etc., but can be usedfor all kinds ot' dry grinding machineswhatever the construction of their framework, and the method of drivingthem may be.

As shown inlthe drawing (Fig. 1l the grinding plates u and b aresuperposed and arrangedA to operate in a horizontal plane, the emeryplate u forming the upper rotating plate, while the grooved metal plateis the lower plate which isy fixed to the frame or table of the machine.liateially 011 the outer edge otthis fixed metal plate Z) the device isprovided .for removing the balls the balls to change their relativeposition and their groove paths. {Fl-ie removal of the balls from thegroove metal plate b takes place, owing to the fact, that the annulargrooves in this plate are recessed at the place at which the'device c itfitted, and that curved paths al (in the form of closed tubes orpassages) are located Yin this recess and connect on the one hand withthe outlets from the groove paths, and on the other hand open intothe'mixingreservoir or chamber m. For the purpose of reconducting theballs similar curved paths g are provided connecting on the other sidewith the grooves in the annular plate and, ruiming over the detlec'tingcurves d, extend into the mixing chamber m. Owing to this guidance ofthe balls in 'these curves forming the continuation of .the groovedpaths in the metal plate outward to the mixing chamber and from this ina curve inward back to the plate, the certainty is attained that theballs leaving one groove path will always enter another. groove path.Experience has shown that by this means the output ot the machine isincreased, and the balls tolerance.V

What I claim as my invention and desire to secure by Letters Patent is:

1. A ball grinding machine comprising ball grindingplates operating in ahorizontal plane, means fer operatin one of said plates, grooves in oneof said p ates and ball detlecting, mixing and returning means operiat-ing in conjunction with said grooved p ate. m

2. A ball grinding machine comprising an emery ball grinding plate,rotating in ahorizontal plane, a cooperating stationary emery plate, andballdetlecting, mixing and returning means operating in conjunction withsaid stationary grooved plate. Y

3. A ball grinding machine comprising ball grinding plates operating ina horizontal plane, means for operating one of said plates, grooves inone of said plates, a

grooves in said ball deflecting member being continuous with the groovesin said plate, ball mixing means and ball returning means including afurther grooved ball deflecting are giound exactly to the cxtreme limitot'4 grooved plate, means adapted to operate said i grooved balldetlecting member acting'ir conjunction with said groove@` plate, -thej-Patented Dec. 6, 1.910.

t `ftr'oni time to time from the. horizontal plate li and returning themto itin order to cause member the grooves of 'which are also contnuouswith said grooved plate.

4. A ball grindin machlne comprising a rotatable elnery bal grindingplate, a, stationary grooved ball grinding plate, means adapted tooperatel said emery plate to rotate in :L horizontal plane, a groovedball4 delecting member acting in conjunction with said grooved pleite,the grooves in said defiecting member being continuous with the grooyesin said plate, ball mixing means and ball returning means including agrooved ball delecting member the grooves of which are also continuouswith Said grooved plate.

In Witness whereof, I have hereunto signed 15 my name in the presence oftwo subscribing witnesses.

BERTHOLD EITNER.

Witnesses:

ROBERT MICHELSKI, lVOLDEMAR HAUPT.

